Paint brush cleaning machine



FIG. 1 is a front elevational view of a paint brush cleaning machine, showing a typical embodiment of my new design;

FIG. 2 is a left-hand side view;

FIG. 3 is a rear elevational view;

FIG. 4 is a top plan view;

FIG. 5 is an enlarged perspective view as seen from the top and front; and,

FIG. 6 is an enlarged perspective view as seen from the top and rear.

The appearance of the right-hand side is a mirror image of the left-hand side.

The bottom is flat and unornamented. 

The ornamental design for a paint brush cleaning machine, as shown and described. 